/*	
 *  Copyright (c) 2009-@year@. The GUITAR group at the University of Maryland. Names of owners of this group may
 *  be obtained by sending an e-mail to atif@cs.umd.edu
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
 *  documentation files (the "Software"), to deal in the Software without restriction, including without 
 *  limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 *	the Software, and to permit persons to whom the Software is furnished to do so, subject to the following 
 *	conditions:
 * 
 *	The above copyright notice and this permission notice shall be included in all copies or substantial 
 *	portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT 
 *	LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO 
 *	EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 
 *	IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR 
 *	THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 */
package edu.umd.cs.imut.executor;

import java.util.ArrayList;
import java.util.List;

import edu.umd.cs.imut.exception.IException;

/**
 * 
 * Main tool class for all executors
 * 
 * @author <a href="mailto:baonn@cs.umd.edu"> Bao N. Nguyen </a>
 * 
 */
public class ExecutorTool {
	List<IExecutorMonitor> lExecutorMonitor = new ArrayList<IExecutorMonitor>();
	IExecutor executor;

	/**
	 * @param executor
	 */
	public ExecutorTool(IExecutor executor) {
		super();
		this.executor = executor;
	}

	public void addMonitor(IExecutorMonitor em) {
		this.lExecutorMonitor.add(em);
		em.executor = executor;
	}

	public void removeMonitor(IExecutorMonitor em) {
		this.lExecutorMonitor.remove(em);
		em.executor = null;
	}

	/**
	 * Execute the tool
	 * @throws IException 
	 */
	public void execute() throws IException {
		executor.starts();
		for (IExecutorMonitor em : lExecutorMonitor) {
			em.beforeAllEvents();
		}

		while (executor.hasNextEvent()) {
			for (IExecutorMonitor em : lExecutorMonitor) {
				em.beforeEvent();
			}

			executor.performNextEvent();

			for (IExecutorMonitor em : lExecutorMonitor) {
				em.afterEvent();

			}

		}

		for (IExecutorMonitor em : lExecutorMonitor) {
			em.afterAllEvents();
		}

		executor.terminates();

	}

}
